Method of preserving wood



drawings, and to VILLIAM YOUNGBLOOD, OF JAMAICA, NENV YORK.

METHO SPECIFICATION forming part of Letters Patent 1888. Serial No. 263,226. (No model.)

Application filed February '7,

D OF PRESERVlNG wooo.

No. 398,366, dated February 19, 1889.

To all whom it may concern:

Be it known that 1, WILLIAM YOUNGBLOOD,

of Jamaica, in the county of Queens and State of New York, have invented a certain new and useful Process. of Treating Vood; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying the letters of reference marked thereon, which form part of this specification.

This invention relates to wood preservation, and its objects are to provide a composition of matter for treating the wood to in- 1 durability of the same and render it impervious to atmosphere or moisture; and

the invention will be clearly understood in the following description, and particularly pointed out in the appended claim.

Figure 1 represents a kiln; Fig. 2, a tank in which the wood may be boiled or saturated; and Fig. 3 represents a dry-house, all

of which are or maybe employed in carrying out my invention.

The drawings represent one apparatus in use for carrying the invention into effect, wherein A designates a kiln or dry-house in which the wood to betreated is dried. After the drying the wood is introduced into a tank, 13, in which is the solution hereinafter specified-for treating the wood The tank should be so constructed that heat can be applied thereto to boil the solution. The wood is left in tank B until it is thoroughly saturated, if small, or, if large, until its outer portions are saturated for a depth of several inches. For instance, if the wood should be eight or twelve inches in cross-section, it will become saturated about one-half through in thirty minutes, which degree of saturation in practical use is found sufficient. time taken to saturate the different kinds and sizes of wood is of course governed by thehardness and texture of such wood. After treatment in tank B the wood is taken to a second drying-house or kiln, 0, when it is thoroughly dried by the application of heat, or it may be left there to dry spontaneously without the application of heat, but must be rotected from the sun and weather.

The solution with which I propose to saturate the wood in the tank Bis made in the following proportions: Saltpeter, fifteen pounds; water, fifty gallons, and red-sanders bark For its equivalent, ten pounds. The water is The purpose specified.

that I claim the foregoing as 1 my own I affix my first heated to boiling-point in said tank, and then the saltpeter is added thoroughly dissolved. Then I add about ten pounds of red-sanders bark, and the mixture is then boiled for about thirty minutes, unti water, which accomplishes the same l portion of twenty pounds to fifty gallons of l l poses. 2 The use of the salt-peter closes the pores f the wood and renders it partially impervious to the atmosphere or water. The red-sanders more effectually close the pores and to set and to hold the saltpeter in the same, and will greatly prolong the preservation of the wood. Red-sanders will also stain the Wood a dark red, so that its use in the composition can be readily detected.

\Vhen treating wood that is to be exposed constantly to the action of water, after it has been subjected to the action of the above ingredients and dried, as described, I give it a bath of parafiine at boiling-heat for fifteen minutes or more, according to the size of the wood. Other apparatus may be employed for practically carrying out my improved process than that described herein, and therefore I do not confine myself to the employment of such apparatus.

Having described my invention, what I claim, and desire to secure by Letters Patent, 18,

The herein-described method of preserving wood, consisting of first saturating the dried wood with a solution 016W and water, and redrs or 1 ornia redwood bark, in about the proportions stated, and then dryin the same, and, secondly, in subsequeiitlysaturating the wood in a bath ofparaffine, all substantially as and for the In testimony signature in presence of two witnesses.

WM. YOUNGBLOOD.

Witnesses:

- JOHN H. BRINCKERHOFF,

STARR BRINoKERHoFF.

and stirred until l6o 4 thoroughly mixed, after which the wood is California redwood bark is added to 

